Execute a unit of processing work to be performed. This {@link Command} may either complete the required processingand return true
, or delegate remaining processing to the next {@link Command} in a {@link Chain} containing this{@link Command} by returning false
@param context The {@link Context} to be processed by this{@link Command}
@exception Exception general purpose exception returnto indicate abnormal termination
@exception IllegalArgumentException if context
is null
@return true
if the processing of this {@link Context}has been completed, or false
if the processing of this {@link Context} should be delegated to a subsequent{@link Command} in an enclosing {@link Chain}
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